US4204629A - Brush seal and a method of manufacture - Google Patents
Brush seal and a method of manufacture Download PDFInfo
- Publication number
- US4204629A US4204629A US05/922,522 US92252278A US4204629A US 4204629 A US4204629 A US 4204629A US 92252278 A US92252278 A US 92252278A US 4204629 A US4204629 A US 4204629A
- Authority
- US
- United States
- Prior art keywords
- mandrel
- plates
- filament
- bristle
- bristle material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 38
- 238000004804 winding Methods 0.000 claims abstract description 22
- 238000005304 joining Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000009730 filament winding Methods 0.000 claims 2
- 238000003466 welding Methods 0.000 description 3
- 238000009732 tufting Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 229910001235 nimonic Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46D—MANUFACTURE OF BRUSHES
- A46D3/00—Preparing, i.e. Manufacturing brush bodies
- A46D3/04—Machines for inserting or fixing bristles in bodies
- A46D3/05—Machines for inserting or fixing bristles in bodies for fixing the bristles between wires, tapes, or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/328—Manufacturing methods specially adapted for elastic sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
- F16J15/3288—Filamentary structures, e.g. brush seals
Definitions
- the present invention relates to brushes, which may be used as seals, and to a method of manufacture thereof.
- a brush seal which comprises a pair of side-plates between which a plurality of brush bristles are held and from which they project freely from one or other of the edges.
- the bristles are integrally joined to the side-plates by welding or brazing or other suitable methods.
- These brush seals are made by a method which includes the steps, inter alia, of first forming a brush by tufting the bristles into a backing ring, clamping the projecting bristles between the side-plates and integrally joining them to the side-plates before removing the backing ring.
- the object of the present invention is to provide a method of manufacture of a brush suitable for use as a seal, and which avoids this disadvantage.
- a method of manufacture of a brush comprises steps of:
- the side-plates may be supported in pairs on the mandrel and may be held in spaced apart relationship or in contact with each other, and the mandrel may be straight, arcuate or completely annular to produce similarly shaped seals.
- the winding operation may be carried out on a conventional toroidal or spiral winding machine, in which an annular filament carrier is mounted for rotation in rollers and the article to be wound, also supported in rollers, passes through the carrier.
- the speeds of rotation of the filament carrier and the article to be wound are adjusted by a gear connection.
- a pair of side-plates are mounted back-to-back on a mandrel and are wound on a toroidal winding machine using a single filament carrier.
- the winding machine may include a plurality of filament carriers.
- the side-plates may be positioned on the mandrel to produce inwardly or outwardly facing bristles in the completed brush, and more than one pair of side-plates may be carried by the mandrel and simultaneously wound with bristle filaments.
- a tensioning device is provided for each filament of bristle material to be wound, which may be a spring device for frictionally retarding the speed of the winding device.
- FIG. 1 illustrates pictorially an annular mandrel being wound by an annular filament carrier on a conventional toroidal winding machine
- FIG. 2 is an enlarged view of the mandrel being wound showing the angle of the wound bristle filament
- FIGS. 3a to 3d show sections through a mandrel during various stages of the process.
- FIG. 4 illustrates an alternative winding process
- FIG. 1 of the drawings there is shown a conventional toroidal winding machine which may be of the kind supplied by Herbert Ruff KG of Kunststoff.
- An annular mandrel 10 is mounted for rotation in rollers 11 and carries a pair of annular side-plates 12,14 on its side faces adjacent its radially outer periphery.
- the mandrel is arranged to pass through an annular filament carrier 20 which is channel-shaped and on which is wound a continuous filament 24 of a metallic bristle material.
- the filament carrier 20 is supported for rotation in a plurality of rollers 16, one of which is connected to a drive shaft 18 for rotating the spool carrier, and a similar driving arrangement (not shown) is used for driving rollers 11 supporting the mandrel 10.
- the bristle filament can be arranged to lie at any desired angle on the side-plates as shown in FIG. 2.
- the relative speed of the mandrel can be reduced so that the windings thereon lie close together. Then as viewed from opposite sides of the mandrel the windings will have opposite inclinations.
- opposite handled seals may be produced in which case, as shown in FIGS. 3a to 3d where the side-plates of the seal are to be of different radial depth, one side-plate of each size is mounted on the mandrel back-to-back.
- FIGS. 3a to 3d show the steps of the process for making a seal by the method.
- the mandrel 10 is shown in FIG. 3a and consists of an annular block 30 of substantially rectangular cross-section and having cutouts at 32 and 34 at its radially outer periphery for receiving the side-plates 12,14. Further recesses 36 and 38 are provided in the side faces of the mandrel to allow for the bristle material to be cut without de-facing the mandrel so that the mandrel can be reused.
- a metallic chill block 39 is carried at its radially outer periphery, which lies between the side-plates and serves to conduct welding heat from the side-plates during the process of joining the bristle material to the side-plates.
- FIG. 3b shows the mandrel with the side-plates in position and the bristle material wound over the whole assembly.
- the side-plates may be attached to the mandrel by glueing or by being a press fit.
- FIG. 3c shows the positioning of a second pair of plates 40 and 41 to overlie the bristle material, and the welding of the bristle material to these plates at their radially outer edge.
- FIG. 3d illustrates the finished seal which is produced after the bristle material has been cut through at the recesses 36 and 38, and the free bristle ends and the weld material have been trimmed to finished size.
- the angle of the bristles is preferably of the order of 45° which allows the bristles to rub with minimum wear on a rotating component.
- the seals are mounted in use with the bristles angled in the direction of rotation of the component.
- FIG. 4 illustrates an alternative winding mechanism which uses multiple filaments for speeding up the winding process.
- the filament carrier is roller driven and has eight spools 42 mounted on a spool carrier 43, each spool feeds a filament onto the mandrel.
- the filaments from the spools 42 are passed through holes 44 in one of the side-plates of the spool carrier 43 to ensure that they always emerge in the same plane to avoid variations in the winding angle as the spools unwind.
- the spool carrier is hinged at 46 and latched at 48 to enable the annular mandrel to pass through the inside thereof.
- friction drives are illustrated, clearly gears could be substituted for one or more of the rollers shown or provided in addition thereto, and surfaces of the mandrel and spool carrier can be provided with teeth for providing a positive gear drive.
- additional supporting rollers may be positioned at suitable positions around their circumferences.
- the widths of the side-plates may be different as shown in FIG. 3d to give greater bristle flexibility with maximum support in one direction during use, or one face of one of the side-plates may be slightly recessed at the radially inner edge to reduce the contact length of the bristles with the side-plate on one side.
- the side-plates may be arranged along with the recesses 36,38 in the mandrel to provide for radially outwardly facing bristles, and more than one pair of side-plates may be carried on the mandrel.
- the side-plates have been shown mounted back to back and axially spaced apart, but they may be mounted back to back with faces in contact on an annular support ring, so that a less expensive mandrel may be used, and a double seal with oppositely inclined bristles on each side can be made. Alternatively, only one side-plate may be mounted on the mandrel.
- Metallic bristle filaments have been described and a preferred material for high temperature use is a Nickel alloy sold under the trade name of NIMONIC 90.
- the bristles, once wound, are heat-treated briefly to remove any tendency for them to curl up in the finished seal.
- non-metallic bristles may be used, e.g. plastic or fibre-reinforced plastic for low temperature applications, or even carbon fibres for high temperature applications. Such materials would be resin-bonded to the side-plates at one radial extremity thereof.
- the mandrel may be straight or arcuate depending on the shape of seal required.
- each spool may be attached to each spool, e.g. a spring in frictional contact with the spool, to provide some drag on its rotation and thus a tension in the filament.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Devices (AREA)
- Wire Processing (AREA)
- Brushes (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3039177 | 1977-07-20 | ||
GB30391/77 | 1977-07-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4204629A true US4204629A (en) | 1980-05-27 |
Family
ID=10306933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/922,522 Expired - Lifetime US4204629A (en) | 1977-07-20 | 1978-07-07 | Brush seal and a method of manufacture |
Country Status (4)
Country | Link |
---|---|
US (1) | US4204629A (ja) |
JP (1) | JPS5474059A (ja) |
DE (1) | DE2830839C2 (ja) |
FR (1) | FR2398235A1 (ja) |
Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4642867A (en) * | 1985-02-20 | 1987-02-17 | Rolls-Royce Limited | Brush seal manufacture |
US4678113A (en) * | 1985-02-20 | 1987-07-07 | Rolls-Royce Plc | Brush seals |
US4730876A (en) * | 1985-07-31 | 1988-03-15 | Motoren- Und Turbinen Union Munchen Gmbh | Apparatus for manufacturing a brush seal |
US5066025A (en) * | 1990-06-18 | 1991-11-19 | Hanrahan Paul R | Brush seal assembly |
US5110033A (en) * | 1991-02-21 | 1992-05-05 | United Technologies Corporation | Segmented brush seal |
US5165758A (en) * | 1991-08-07 | 1992-11-24 | Technetics Corporation | Place and bundle method for the manufacture of brush seals |
US5183197A (en) * | 1991-08-07 | 1993-02-02 | Technetics Corp. | Bundle and place method for the manufacture of brush seals |
US5308088A (en) * | 1992-08-20 | 1994-05-03 | General Electric Company | Brush seal with flexible backing plate |
US5318309A (en) * | 1992-05-11 | 1994-06-07 | General Electric Company | Brush seal |
US5335920A (en) * | 1992-08-20 | 1994-08-09 | General Electric Company | Brush seal |
US5403071A (en) * | 1993-11-24 | 1995-04-04 | United Technologies Corporation | Method of brush seal tufting |
US5568931A (en) * | 1992-08-20 | 1996-10-29 | General Electric Company | Brush seal |
US5678898A (en) * | 1995-04-17 | 1997-10-21 | General Electric Company | Method for making a brush seal |
US6231047B1 (en) | 1998-05-29 | 2001-05-15 | Eg&G Engineered Products | Brush seal |
US20030062684A1 (en) * | 2001-09-28 | 2003-04-03 | Eagle Industry Co., Ltd. | Brush seal |
US6644667B2 (en) | 2001-02-23 | 2003-11-11 | Cmg Tech, Llc | Seal assembly and rotary machine containing such seal |
US6681486B2 (en) * | 1999-12-24 | 2004-01-27 | Cross Manufacturing Company (1938) Limited | Method of forming brush seals between rotating components |
US20070214628A1 (en) * | 2006-03-17 | 2007-09-20 | General Electric Company | Methods of manufacturing a segmented brush seal for sealing between stationary and rotary components |
US20080001363A1 (en) * | 2006-06-28 | 2008-01-03 | General Electric Company | Brush sealing system and method for rotary machines |
US7578509B2 (en) | 2001-02-23 | 2009-08-25 | Cmg Tech, Llc | Seal assembly and rotary machine containing such seal |
US20100064499A1 (en) * | 2005-09-29 | 2010-03-18 | General Electric Company | Method of manufacturing a brush seal for sealing between stationary and rotary components |
US20110142666A1 (en) * | 2010-11-15 | 2011-06-16 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US20110175296A1 (en) * | 2007-08-22 | 2011-07-21 | Cross Manufacturing Company (1938) Ltd | Brush Seals |
US20110272891A1 (en) * | 2009-02-06 | 2011-11-10 | General Electric Company | Systems and Methods and Apparatus Involving Fabricating Brush Seals |
US20120134837A1 (en) * | 2011-12-19 | 2012-05-31 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US8414261B2 (en) | 2011-05-31 | 2013-04-09 | General Electric Company | Noise reducer for rotor blade in wind turbine |
CN103143656A (zh) * | 2013-02-04 | 2013-06-12 | 沈阳黎明航空零部件制造有限公司 | 一种排丝机和用该排丝机制作刷式密封装置的方法 |
US8596973B2 (en) | 2009-12-07 | 2013-12-03 | Cmg Tech, Llc | Leaf seal assembly including polymer member and rotary machine containing such seal assembly |
US8834127B2 (en) | 2011-09-09 | 2014-09-16 | General Electric Company | Extension for rotor blade in wind turbine |
CN104550564A (zh) * | 2015-01-13 | 2015-04-29 | 江苏透平密封高科技股份有限公司 | 一种用于刷式密封制造的多线轴同心式自动绕丝机 |
CN104550581A (zh) * | 2015-01-13 | 2015-04-29 | 江苏透平密封高科技股份有限公司 | 一种用于刷式密封制造的槽环储丝式自动绕丝机 |
CN104727864A (zh) * | 2015-04-08 | 2015-06-24 | 江苏透平密封高科技股份有限公司 | 一种密封刷自动加工体系 |
US20160327160A1 (en) * | 2015-05-05 | 2016-11-10 | MTU Aero Engines AG | Method for manufacturing brush seals with obliquely positioned bristles and a corresponding device |
US9494134B2 (en) | 2013-11-20 | 2016-11-15 | General Electric Company | Noise reducing extension plate for rotor blade in wind turbine |
US10180125B2 (en) | 2015-04-20 | 2019-01-15 | General Electric Company | Airflow configuration for a wind turbine rotor blade |
US10330348B2 (en) | 2012-02-17 | 2019-06-25 | David Alan McBay | Closed-loop geothermal energy collection system |
US10465652B2 (en) | 2017-01-26 | 2019-11-05 | General Electric Company | Vortex generators for wind turbine rotor blades having noise-reducing features |
US10605491B2 (en) | 2012-02-17 | 2020-03-31 | David Alan McBay | Geothermal energy collection system |
US10746157B2 (en) | 2018-08-31 | 2020-08-18 | General Electric Company | Noise reducer for a wind turbine rotor blade having a cambered serration |
US10767623B2 (en) | 2018-04-13 | 2020-09-08 | General Electric Company | Serrated noise reducer for a wind turbine rotor blade |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6015856A (ja) * | 1983-07-06 | 1985-01-26 | Tokyo Tatsuno Co Ltd | 磁気メデイア読取り装置 |
US4884850A (en) * | 1988-08-30 | 1989-12-05 | Pratt & Whitney Canada, Inc. | Method and apparatus for manufacturing compliant brush seals |
DE19528508A1 (de) * | 1995-08-03 | 1997-02-06 | Mtu Muenchen Gmbh | Verfahren zur Herstellung einer Bürstendichtung |
DE19641375C1 (de) * | 1996-10-08 | 1997-12-04 | Mtu Muenchen Gmbh | Herstellungsverfahren für und Vorrichtung zum Herstellen von Bürstendichtungen |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2449668A (en) * | 1943-11-09 | 1948-09-21 | Osborn Mfg Co | Method of and apparatus for making brushes |
US2634167A (en) * | 1949-07-14 | 1953-04-07 | Hewitt Robins Inc | Method of making brushes |
US2878048A (en) * | 1954-03-18 | 1959-03-17 | Osborn Mfg Co | Brush seal and the like |
US3917150A (en) * | 1973-11-23 | 1975-11-04 | Rolls Royce 1971 Ltd | Seals and method of manufacture thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2672640A (en) * | 1945-05-23 | 1954-03-23 | Osborn Mfg Co | Brush and method of making same |
GB839731A (en) * | 1957-09-19 | 1960-06-29 | Bendix Aviat Corp | Sealing arrangement for bearing assemblies |
-
1978
- 1978-07-07 US US05/922,522 patent/US4204629A/en not_active Expired - Lifetime
- 1978-07-13 DE DE2830839A patent/DE2830839C2/de not_active Expired
- 1978-07-19 FR FR7821356A patent/FR2398235A1/fr active Granted
- 1978-07-20 JP JP8892578A patent/JPS5474059A/ja active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2449668A (en) * | 1943-11-09 | 1948-09-21 | Osborn Mfg Co | Method of and apparatus for making brushes |
US2634167A (en) * | 1949-07-14 | 1953-04-07 | Hewitt Robins Inc | Method of making brushes |
US2878048A (en) * | 1954-03-18 | 1959-03-17 | Osborn Mfg Co | Brush seal and the like |
US3917150A (en) * | 1973-11-23 | 1975-11-04 | Rolls Royce 1971 Ltd | Seals and method of manufacture thereof |
Cited By (50)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4642867A (en) * | 1985-02-20 | 1987-02-17 | Rolls-Royce Limited | Brush seal manufacture |
US4678113A (en) * | 1985-02-20 | 1987-07-07 | Rolls-Royce Plc | Brush seals |
US4730876A (en) * | 1985-07-31 | 1988-03-15 | Motoren- Und Turbinen Union Munchen Gmbh | Apparatus for manufacturing a brush seal |
US5066025A (en) * | 1990-06-18 | 1991-11-19 | Hanrahan Paul R | Brush seal assembly |
US5110033A (en) * | 1991-02-21 | 1992-05-05 | United Technologies Corporation | Segmented brush seal |
US5165758A (en) * | 1991-08-07 | 1992-11-24 | Technetics Corporation | Place and bundle method for the manufacture of brush seals |
US5183197A (en) * | 1991-08-07 | 1993-02-02 | Technetics Corp. | Bundle and place method for the manufacture of brush seals |
US5318309A (en) * | 1992-05-11 | 1994-06-07 | General Electric Company | Brush seal |
US5308088A (en) * | 1992-08-20 | 1994-05-03 | General Electric Company | Brush seal with flexible backing plate |
US5335920A (en) * | 1992-08-20 | 1994-08-09 | General Electric Company | Brush seal |
US5568931A (en) * | 1992-08-20 | 1996-10-29 | General Electric Company | Brush seal |
US5403071A (en) * | 1993-11-24 | 1995-04-04 | United Technologies Corporation | Method of brush seal tufting |
US5678898A (en) * | 1995-04-17 | 1997-10-21 | General Electric Company | Method for making a brush seal |
US6231047B1 (en) | 1998-05-29 | 2001-05-15 | Eg&G Engineered Products | Brush seal |
US6681486B2 (en) * | 1999-12-24 | 2004-01-27 | Cross Manufacturing Company (1938) Limited | Method of forming brush seals between rotating components |
US6644667B2 (en) | 2001-02-23 | 2003-11-11 | Cmg Tech, Llc | Seal assembly and rotary machine containing such seal |
US7578509B2 (en) | 2001-02-23 | 2009-08-25 | Cmg Tech, Llc | Seal assembly and rotary machine containing such seal |
US20030062684A1 (en) * | 2001-09-28 | 2003-04-03 | Eagle Industry Co., Ltd. | Brush seal |
US6733014B2 (en) * | 2001-09-28 | 2004-05-11 | Eagle Industry Co., Ltd. | Brush seal |
US20100064499A1 (en) * | 2005-09-29 | 2010-03-18 | General Electric Company | Method of manufacturing a brush seal for sealing between stationary and rotary components |
US8069562B2 (en) * | 2005-09-29 | 2011-12-06 | General Electric Company | Method of manufacturing a brush seal for sealing between stationary and rotary components |
US20070214628A1 (en) * | 2006-03-17 | 2007-09-20 | General Electric Company | Methods of manufacturing a segmented brush seal for sealing between stationary and rotary components |
US7565729B2 (en) * | 2006-03-17 | 2009-07-28 | General Electric Company | Methods of manufacturing a segmented brush seal for sealing between stationary and rotary components |
US20080001363A1 (en) * | 2006-06-28 | 2008-01-03 | General Electric Company | Brush sealing system and method for rotary machines |
US20110175296A1 (en) * | 2007-08-22 | 2011-07-21 | Cross Manufacturing Company (1938) Ltd | Brush Seals |
US20110272891A1 (en) * | 2009-02-06 | 2011-11-10 | General Electric Company | Systems and Methods and Apparatus Involving Fabricating Brush Seals |
US8925199B2 (en) * | 2009-02-06 | 2015-01-06 | General Electric Company | Systems and methods and apparatus involving fabricating brush seals |
US8596973B2 (en) | 2009-12-07 | 2013-12-03 | Cmg Tech, Llc | Leaf seal assembly including polymer member and rotary machine containing such seal assembly |
US20110142666A1 (en) * | 2010-11-15 | 2011-06-16 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US8523515B2 (en) | 2010-11-15 | 2013-09-03 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US8414261B2 (en) | 2011-05-31 | 2013-04-09 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US8834127B2 (en) | 2011-09-09 | 2014-09-16 | General Electric Company | Extension for rotor blade in wind turbine |
US20120134837A1 (en) * | 2011-12-19 | 2012-05-31 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US8430638B2 (en) * | 2011-12-19 | 2013-04-30 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US10330348B2 (en) | 2012-02-17 | 2019-06-25 | David Alan McBay | Closed-loop geothermal energy collection system |
US11519639B2 (en) | 2012-02-17 | 2022-12-06 | David Alan McBay | Geothermal energy collection system |
US11131484B2 (en) | 2012-02-17 | 2021-09-28 | David Alan McBay | Geothermal energy collection system |
US10605491B2 (en) | 2012-02-17 | 2020-03-31 | David Alan McBay | Geothermal energy collection system |
CN103143656A (zh) * | 2013-02-04 | 2013-06-12 | 沈阳黎明航空零部件制造有限公司 | 一种排丝机和用该排丝机制作刷式密封装置的方法 |
US9494134B2 (en) | 2013-11-20 | 2016-11-15 | General Electric Company | Noise reducing extension plate for rotor blade in wind turbine |
CN104550564A (zh) * | 2015-01-13 | 2015-04-29 | 江苏透平密封高科技股份有限公司 | 一种用于刷式密封制造的多线轴同心式自动绕丝机 |
CN104550581A (zh) * | 2015-01-13 | 2015-04-29 | 江苏透平密封高科技股份有限公司 | 一种用于刷式密封制造的槽环储丝式自动绕丝机 |
CN104727864B (zh) * | 2015-04-08 | 2016-03-16 | 江苏透平密封高科技股份有限公司 | 一种密封刷自动加工体系 |
CN104727864A (zh) * | 2015-04-08 | 2015-06-24 | 江苏透平密封高科技股份有限公司 | 一种密封刷自动加工体系 |
US10180125B2 (en) | 2015-04-20 | 2019-01-15 | General Electric Company | Airflow configuration for a wind turbine rotor blade |
US10201845B2 (en) * | 2015-05-05 | 2019-02-12 | MTU Aero Engines AG | Method for manufacturing brush seals with obliquely positioned bristles and a corresponding device |
US20160327160A1 (en) * | 2015-05-05 | 2016-11-10 | MTU Aero Engines AG | Method for manufacturing brush seals with obliquely positioned bristles and a corresponding device |
US10465652B2 (en) | 2017-01-26 | 2019-11-05 | General Electric Company | Vortex generators for wind turbine rotor blades having noise-reducing features |
US10767623B2 (en) | 2018-04-13 | 2020-09-08 | General Electric Company | Serrated noise reducer for a wind turbine rotor blade |
US10746157B2 (en) | 2018-08-31 | 2020-08-18 | General Electric Company | Noise reducer for a wind turbine rotor blade having a cambered serration |
Also Published As
Publication number | Publication date |
---|---|
FR2398235A1 (fr) | 1979-02-16 |
DE2830839A1 (de) | 1979-02-08 |
FR2398235B1 (ja) | 1983-06-17 |
DE2830839C2 (de) | 1982-05-13 |
JPS5474059A (en) | 1979-06-13 |
JPS5733471B2 (ja) | 1982-07-17 |
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